Description
Third rear brake light with washer nozzle for CITROËN C1, PEUGEOT 107 and TOYOTA AYGO. This is a used part; the rubber seal is leaking and must be bonded with silicone.
Reliable replacement high‑mount stop lamp (CHMSL) with integrated washer jet, suitable for first‑generation Citroën C1, Peugeot 107 and Toyota Aygo. Ideal for professional workshops and experienced DIY enthusiasts looking to restore rear visibility and washer function after minor damage or seal failure. The unit is sold as used and may show signs of wear; the sealing lip is not watertight and requires adhesion with silicone prior to installation to prevent water ingress.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C1, Peugeot 107, Toyota Aygo
- Product Codes: 1606372780, 6351W4
- Other Numbers: No additional reference numbers available
Function And Benefits
The third brake light (centre high‑mount stop lamp) improves rear visibility for following traffic and is a legal safety item in most markets. This version includes an integrated washer nozzle to clean the rear window area, helping maintain lamp and rear‑view visibility. Replacing a faulty CHMSL restores brake signal clarity and washer function at the rear of the vehicle.
Replacement Procedure (Overview)
Recommended for mechanics and competent DIYers. Typical replacement steps:
- Open the tailgate and remove the inner trim to access the third brake light assembly.
- Unscrew the fasteners securing the lamp (retain screws/clips for reinstallation).
- Carefully disconnect the electrical connector and the washer hose; note hose routing and connector orientation.
- Remove the old unit and clean the mounting surface, removing old sealant and debris.
- Because this used unit has a leaking rubber seal, apply a suitable automotive silicone sealant evenly to the mating surface before fitting.
- Refit the lamp, reconnect the washer hose and electrical connector, secure fasteners, replace trim, and test brake light and washer operation.
Typical tools: trim tool, ratchet/screwdriver set, pick for hoses, and silicone sealant. Disconnecting the negative battery terminal before working on electrical connectors is recommended as a basic safety precaution.
Installation Recommendations
- Use a high‑quality, automotive‑grade silicone to ensure a durable watertight seal between the unit and tailgate.
- Inspect the washer hose for cracks or blockages and replace if necessary to avoid future leaks.
- Check the electrical connector and wiring for corrosion; clean contacts before reconnecting to ensure reliable operation.
- After installation, test brake lamp illumination at multiple pressure points and verify washer jet alignment.
Why This Part Most Commonly Fails
- Degraded Rubber Seal: Exposure to weather and temperature cycles causes the rubber gasket to harden or split, allowing water to enter and damage contacts or the lamp.
- Impact And Body Damage: Rear impacts or closing the tailgate with obstructions can crack the lens or deform the housing.
- Corrosion Of Connectors: Water ingress leads to corrosion at the electrical connector, causing intermittent or permanent failure of the light.
- Washer Nozzle Blockage: Dirt and debris can block the jet, reducing washer effectiveness and increasing pressure/strain on the hose and fittings.
Condition Note: Sold as a used item. The sealing lip on this unit is not watertight and requires bonding with silicone prior to fitment to ensure longevity and prevent water‑related faults.
